
Flicker Severity:Intensity of the discomfort caused by the flicker-defined measurement method UIE-IEC flicker and evaluated according to the following amounts: - Short-term severity (Pst) measured over a period of 10 min; - Severity of long-term (Plt) calculated from a sequence of 12 Pst values at an interval of 2 h, using the following formula:Hollow supply voltage:Sudden decrease of the supply voltage to a value between 90% and 1% of the declared voltage Uc, followed by the restoration of voltage after a short period of time. By convention, a voltage dip lasts 10 ms to 1 min. The depth of a voltage dip is defined as the difference between the minimum rms voltage during the voltage dip (residual stress) and the declared voltage. Voltage...